I'm in the process of switching from wood arrows to carbon. I have always used Duco on the wood shafts for the feathers. A couple of months ago I got a few Bemans to try. I attached the feathers with the Duco and it worked great. Tonight I get out in the back yard to shoot a few and the feathers start flying off the shafts! I don't get it. Why did the glue hold for two months and then decide to let go today? Can you not use Duco with carbons or should I scratch up the shafts with some fine sandpaper before attaching the feathers?